diff --git a/charts/rhoso-apps/templates/_helpers.tpl b/charts/rhoso-apps/templates/_helpers.tpl
index 6dd9b07..ea53df7 100644
--- a/charts/rhoso-apps/templates/_helpers.tpl
+++ b/charts/rhoso-apps/templates/_helpers.tpl
@@ -96,3 +96,16 @@ Pass dict with key "app" (per-application values map).
 {{- $f := default (list "resources-finalizer.argocd.argoproj.io/background") $app.finalizers }}
 {{- toYaml $f -}}
 {{- end }}
+
+{{/*
+Optional spec.ignoreDifferences (Argo CD ignoreDifferences).
+Pass dict with key "app" (per-application values map). Omitted if unset or empty.
+*/}}
+{{- define "rhoso-apps.ignoreDifferences" -}}
+{{- $app := .app -}}
+{{- $ignore := $app.ignoreDifferences | default list }}
+{{- if not (empty $ignore) }}
+  ignoreDifferences:
+{{ toYaml $ignore | indent 4 }}
+{{- end }}
+{{- end }}
diff --git a/charts/rhoso-apps/templates/application.yaml b/charts/rhoso-apps/templates/application.yaml
index 71ed96f..f6213c8 100644
--- a/charts/rhoso-apps/templates/application.yaml
+++ b/charts/rhoso-apps/templates/application.yaml
@@ -19,6 +19,7 @@ spec:
 {{ include "rhoso-apps.sourceKustomize" (dict "app" $app) }}
   destination:
     server: {{ include "rhoso-apps.destinationServer" $ }}
+{{ include "rhoso-apps.ignoreDifferences" (dict "app" $app) }}
 {{ include "rhoso-apps.syncPolicySpec" (dict "app" $app) }}
 {{- end }}
 {{- end }}
diff --git a/charts/rhoso-apps/values.schema.json b/charts/rhoso-apps/values.schema.json
index ef154eb..02e0c71 100644
--- a/charts/rhoso-apps/values.schema.json
+++ b/charts/rhoso-apps/values.schema.json
@@ -111,6 +111,14 @@
               "resources-finalizer.argocd.argoproj.io/foreground"
             ]
           }
+        },
+        "ignoreDifferences": {
+          "type": "array",
+          "description": "Argo CD spec.ignoreDifferences to ignore fields during sync comparison.",
+          "items": {
+            "type": "object",
+            "additionalProperties": true
+          }
         }
       }
     }